metal roofing install


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Old 06-13-05, 03:54 PM
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metal roofing install

I need a little expert advice. I plan on putting a metal roof on my fathers front porch and garage. The guy that was going to do it is laid up right now. I have everything needed to start, but not where to start. The garage has shingles and the porch has tin with a mountain of tar on it. If someone could get me started I would be grateful.
 
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Old 06-13-05, 04:30 PM
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Wink

For sure take off all the old roof tin on one and the shingles off the other down to the wood .check all the wood and fix it first . Then put the new metal roof on next over 30 lb felt .

ED
 
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Old 06-13-05, 07:33 PM
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The porch may have strapping that the old tin is nailed to. If this is the case you can skip the felt that would go over the roof sheating.
 
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Old 06-16-05, 06:52 PM
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I would always recommend underlayment under metal, assuming you strip off all the existing GARBAGE first.
 
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Old 06-16-05, 07:57 PM
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Originally Posted by E. Dodge
I would always recommend underlayment under metal, assuming you strip off all the existing GARBAGE first.

Even when attached to strapping [with 12" gaps between boards]?
 
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Old 06-17-05, 09:22 AM
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Yes............its the "Water-Shedding" vs. "Waterproof" thing.
 

Last edited by shinstr; 06-17-05 at 09:41 AM.
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Old 06-19-05, 08:17 AM
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If the "strapping" is nothing more than board actually spaced 12 inches apart, then this would require the 12in. "gaps" be filled in with OTHER boards...or just go over it with some decking. Still should have an underlayment installed....in my opinion.

Of course I've installed metal right over purlins, no underlayment....on a horse barn. An occasional drip here or there won't hurt the hay quite as much as drywall...or worldly possesions.

I've actually never seen spaced sheeting with 12in. gaps. It's usually between 1in. -3in. ...in which case I wouldn't see anything wrong with just throwing down the underlayment over that, with the metal panels.
 
 

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